According to this article: http://www.shamanictonics.com/info/yohim.html
apparently (in rats anyway) decreased the time between "mountings" and also decreased the time between mounting and ejaculation.
It is also shown to increase amphetamine effect AND toxicity.
It apparently counteracts Oxide, reverses the effects of a sedative used in animals, and to top it all off, is an MAOI inhibitor (anti-depressant).
That is of course, according to this article, and applicable to rats (and other animals).
is quite a versatile little substance. This is probably old news to many... but it was news to me, and I found it quite interesting. I never realized that it actually had some human use in erectile dysfunction and was an alpha 2 agonist.